计算机科学 ›› 2015, Vol. 42 ›› Issue (9): 78-82.doi: 10.11896/j.issn.1002-137X.2015.09.016
包建东,徐威利,胡伟伟,谢小敏
BAO Jian-dong, XU Wei-li, HU Wei-wei and XIE Xiao-min
摘要: 针对常规子空间类算法在低信噪比、小快拍数情况下分辨力差的问题,分别对信号和噪声子空间提出加权投影算法来加以改善。对于信号子空间,采用主特征值与噪声功率之差的倒数对其特征向量加权;对于噪声子空间,将导向矢量在噪声子空间正交基各元素上的投影值作为权值,对正交基各元素加权。仿真实验表明,这两种算法能有效降低信源分辨的信噪比和快拍数门限,在低信噪比与小快拍条件下具有较好的分辨力和测量精度。
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